Excavator.



L. J. CHAPIN.

EXCAVATOR.

APPLICATION FILED Aue.2s. I9Ie.

Patented Jam 2, 19H

3 SHEETSASHEET l.

L. J. CHHPIN L. I. CHAPIN.

EXCAVATOR.

APPLICATION FILED AUG.23, I9IG.

1,210,766.. Patented Jan, 2, 1917.

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L. J. CHAPIN.

EXCAV/NOR.

. APPLICATlON FILED AUG.23, |9|6. 210,760. Patented .1311.21917.

LEVIy J. CHAPIN, OF LUVERNE, IOWA, ASSIGNOR OF ONE-HALF TO WILLIAM E.

l MGDONALD, F ALGONA, IOWA.

EXCAVATOR.

Specification of Letters Patent.

Patented Jan. 2, 1917,

Application filed. August 23, 1916. Serial 1\To.;116,511.

T0 all whom t may concern Be it known that I, Lnvr J. CHAPIN, a citi- Zen of the United States, residing at Luverne, in the county of Kossuth and State of Iowa, have invented certain new and useful Improvements in Excavators, of which the following is a specification, reference being had. to the accompanying drawings.

This invention relates to an improved excavator and has for its primary object to provide in an excavator having a traveling bucket or `dipper, automatically operated means for positively discharging or, expelling the earth from the bucket, and scraping the walls thereof.

It is another and more particular object of the invention tovprovide a swinging boom and track vertically adjustable with respect t0 the boom, a traveling clipper mounted upon said track land means for actuating the same, a yoke pivotally supported upon the dipper, a plunger movable within the clipper and operatively connected to the yoke, and means at the outer end of the trackwith which theyoke is adapted to be engaged,

whereby the plunger is actuated when the o dipper is moved to its discharging position and the earth positively expelled from the dipper. v c

Itis a further general object of my invention to provide amachine for the purpose or excavating or diggingditches, which is comparatively simplein construction and light in weight and not liable lto get out of order, and which may bejmanufactured at relatively small eost.

With the above and other objects in view, my invention consists in the novel features of construction, combination and arrangement of parts to behereinaftter more Jully described,`claimed and illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of an excavating machine constructed in accordancevwith the'preferred embodiment of my invention, showing the excavatingbucket or clipper at the inner end of the track; Fig. 42 is a similar view showing the dipper in itsdischarging position; Fig. 3 is a top plan view; Fig. A is a section taken on the line 1 -4 of Fig. 1; Fig. 5 is a section taken on the line 5-5 of Fig. gand Fig. 6 is a section taken on the line 66 of Fig. 3.

Referring in detail to the drawings, 5

designates a suitable base or platform secured upon a frame 6. To the opposite ends of this frame, the transverse beams 7 and 8 respectively are secured, and upon thc ends of the beam 7 the ground wheels 9 are suitably ournaled. Convergently disposed beams 10 extend beneath the platform 5 and are also fixed to the transverse beams 7 and 8, the connected ends of said beams extending forwardly of the base 5 and having a suitable wheel truck 11 swiveled thereto.

To the rear ends of the beams 10, uprights 12 are securely bolted at their lower ends, the upper ends of said uprights being connected by a transverse beam 13. Brace rods 1i are connected to the ends of this transverse beam and to the beam 7. To the rear end of the :trame 6, upwardly converging bars 15 are fixedat their lower ends and a brace rod 16 connects the upper ends of these bars to the center of the transversebeam 13. A vertical bolt 17 is centrally fixed in the transverse beam 7 and upon the upper end thereof a metal plate 18 is loosely engaged, the ends of said plate being formed with upwardly projecting ears 19. To these ears, the lower ends of the spaced bars 20 of a swinging boom are connected. A spacing block is arranged between the upper ends ot said bars and securely fixed thereto. A brace rod 21 is also connected to the free end of the boom at one of its ends and to the transverse beam 13 at its other end. An inverted U-shaped plate is also loosely engaged upon the upper end of the bolt 17, and between the spacedV ends of said plate the lower ends of the spaced track rails 22 are pivotally mounted. Upon the pivot bolt 2S and between the spaced track rails, a guide sheave 24 is loosely engaged. The other ends of the track rails are upwardly curved, as indicated at 25, and between the same one end of a spacing block 26 is fixed by means of the bolt indicated at 27, which projects beyond the opposite sides of the track for a purpose to be later explained. A sheave or pulley 28 is also mounted in the block 26 and a bail 29 is pivotally connected at its ends to said block. 1n the spacing block, between the bars 2O of the boom, a. guide sheave `30 is mounted. One end of a cable 31 is attached to the bail 29 and extends over the sheaveBO. The other end of this cable is attached to a drum 32, the shaft of which is mounted between the upper ends of the spaced standards 33. One end of the drum shaft is provided with a suitable crank 34 which is adapted to be engaged and held by a suitable latch member 35 which is suitably mounted upon the beam 13. By means of the cable 3l, it will be readily understood that the track may be raised or lowered and disposed at any desired inclination.

36 designates the bucket or dipper which is preferably constructed from a single sheet metal plate, the ends of which are riveted or otherwise s ecured together and extended 'upwardly between the track rails, as shown at 37. Spaced rollers 38 arranged in pairs are disposed above and below the respective track rails and mounted upon stud bolts 39 fixed in the ends of the dipper plate. These bolts are connected by the strap bars 40 which retain the rollers in position thereon. To the opposite ends of the 'upwardly 'projectingl portion o-f the bucket, spacedjrods 41 are `securely riveted at one of their ends and connected together at their other ends by the bolt 42. Between the connected ends of said rods, a sheave 43 is mounted upon said bolt, and the arms of an elongated yoke 44 are also loosely engaged, upon the opposite ends of the bolt. The yoke arms extend downwardly upon opposite sides of the track rails, and between the extremities of said arms the end of a plunger rod 45 is loosely engaged upon the bolt 46 connecting the yoke arms. The plunger head 47 fixed to the other end of saidl rod, operates within the rectangular bucket or dipper 36. To o ne end of the bucket, a cable 48 is attached and extends upwardly around the sheave or pulley 28 mounted in the block 26, and then over the pulley 42, and has its other end connected to a Second drum 49 mounted between the spaced standards 33. The shaft of this drum is also provided with a suitable crank 50 which may be held against operation by the latch member 5l. The cable 52 is also connected at one of its ends to the other end of the bucket or dipper 36 and extends under the guide sheave or pulley 24 and over a second guide pulley 52 mounted between the standards 33, and has itsother vend connected to a third drum 54 rotatably mounted between said standards. The shaft of this drum likewise has an operating crank y53.' To the bottom of the. dipper, at its inner end, the dipper knife 55 isriveted or otherwise secured, said knife being of greater width than the bucket and projecting beyond the opposite sides thereof.

Obliquely disposed bars 56 are securely .bolted or Aotherwise Vmounted upon the frame 6 and the uprights 12, and uponthese bars a shaft 57 is rotatably mounted. Upon the ends of this shaft, drums 58 are fixed, and cables 59 are attached at one of their ends to said drums and extend aroundV guide sheaves wound upon one of the drums 58 while the Y other cable will unwind from the other drum and the boom will be swunglaterally in the desired direction.

In the operation of the machine as above described, when the bucket or dipper is drawn inwardly upon the 4supporting track which has been properly adjusted with respect to the boom, the dipper knife cuts into the earth which enters the bucket, and as it accumulates therein' forces the plunger in said bucket longitudinally toward lthe opposite end of the bucket. lVhen the bucket reaches the inner end of the track, it is filled with earth, and the outer end of the track is then raised. The cable connected to Vthe outer end of the bucket is thenwound upon fits drumand the bucket pulled or drawn outwardly upon the track and upwardly on one end'to receive ay drive chain operated from the engine shaft 67. The other end of said drum is provided with a ratchet 68 for engagement by a gravity pawl 69, whereby the drum is securely held against rotation in one direction. VA cable 70y extends beneath the Vplatform land-is attached vat one of its ends to the drum. This cable is of considerable length and is suitably anchored at its other end. Thus, as the work progresses, the cable 70 may be wound upon the drum to move the machine from one place toanother. Y

From the foregoing description, takenin connection with the accompanying draw'- ings, the construction, manner of operation and several advantages of my invention will be clearlv and fully understood.Y

The machine as a whole is comparatively simple and will require but few and .infrequent repairs. It is 'manifest, of course, that the bucket or dipper maybe of any desired Ycapacity and the size and relative proportions of the concomitant parts varied accordingly. The machine is also susceptible of considerable modification in the form, proportion and arrangement of the several elements employed and I, therefore, reserve the privilege of adopting all such legitimate changes as may be fairly embodied within the spirit and scope of the invention as claimed.

Having thus fully described my invention, what I desire to claim and secure by Letters Patent is l. In an excavating machine, a vertically swinging track, a. clipper' mounted to travel upon the track and suspended therefrom, means for moving the dipper, a plunger longitudinally movable in the dipper having a rigid rod projecting from one end of the dipper, a rigid actuating element pivotally supported upon the dipper abo-ve the track and operatively connected to the plunger rod', and means on one 'end of the track with which said element is adapted to engage in the movement of the dipper to its discharging position, whereby the plunger is actuated and the earth expelled from the dipper.

2. In an excavating machine, a track, a dipper suspended from said track for longitudinal movement thereon, means for operating the dipper, a plunger longitudinally movable in the dipper, actuating means pivotally mounted upon the dipper above the track and operatively connected to the plunger, and a fixed stop element on the track at one end thereof adapted to be engaged by said actuating means to move the plunger and expel the earth from the dipper.

3. In an excavating machine, a vertically swinging track having an upwardly curved free end portion, a dipper to travel upon said track, means for moving the dipper, a stop xed to the curved end of the track, a plunger longitudinally movable in the Clipper, and an actuating element pivotally mounted upon the dipper and operatively connected to the plunger, said element engaging said stop when the dipper is moved to its discharging position on the curved end of the track to move the plunger and positively expel the earth from the dipper.

4. In an excavating machine, a vertically swinging track having an upwardly curved free end portion, a dipper to travel upon said track, means for moving the dipper, a stop fixed to the curved end of the track, a plunger longitudinally movable in the dipper, and a yoke member pivotally mounted upon the dipper, the arms of said yoke member straddling the track being operatively connected to the plunger, said yoke arms engaging the stop when the dipper is moved to a discharging position upon the curved end of the track to positively actuate the plunger and expel the earth from the dipper.

' In testimony whereof I hereunto aiix my signature in the presence of two witnesses.

LEVI J. CHAPIN.

Witnesses:

W. H. RANEY, JANIE CHAPIN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente, Washington, D. C. 

